Tgv Deletes - Subaru WRX Forum
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#1 Old 12-06-2005, 10:02 PM
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Tgv Deletes

does anybody know what a tumbler generator valve delete is and what it can do for my car.... http://www.crawfordperformance.com/products/db_cat.cgi?id=3 thanks for the help i really appreciate it
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#2 Old 12-07-2005, 10:57 AM
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It takes the tumble generator valves out of your intake manifold. This will make it pretty much like a JDM intake manifold. The TGV is there for emissions and supposedly low end torque. There really aren't any huge gains from doing this mod to support spending the money on it unless you are absoultely trying to get everything out of your motor that you can. Also, if you did do it, you would have to get your ecu tuned for it or your car would not run good at all.
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#3 Old 12-07-2005, 03:45 PM
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there are a few companies that you can send your intake into to get them removed, I think it is about 200 plus shipping. Or you can do it yourself and remove the flappers but leave the rod in place. That way the ECU "thinks" that the Tumblers are still there and doing their job. I was raeding up about it and found most of this out from NASIOC.com if you were wondering.

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#4 Old 12-07-2005, 06:13 PM
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Slowboyracing claimed they made 100 HP on removing them off the STI....wonder how tru this is

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#5 Old 12-07-2005, 06:51 PM
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Quote:
Originally Posted by soobaroo227
It takes the tumble generator valves out of your intake manifold. This will make it pretty much like a JDM intake manifold. The TGV is there for emissions and supposedly low end torque. There really aren't any huge gains from doing this mod to support spending the money on it unless you are absoultely trying to get everything out of your motor that you can. Also, if you did do it, you would have to get your ecu tuned for it or your car would not run good at all.
There are a modest amount of gains to be had depending on your level of modification.The TVG's are a significant restriction.A stock wrx can easily see a 10whp gain across the powerband,better throttle responce,low end torque and an increase in the rpm range.A VF22 at least around a 20whp gain.

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#6 Old 12-07-2005, 06:51 PM
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Slowboyracing claimed they made 100 HP on removing them off the STI....wonder how tru this is
Not buying that at all.

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#7 Old 12-08-2005, 07:33 AM
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Yea I hear ya....100HP restrtction...a cheap mod like that to give you a 100 HP and then idling issues

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#8 Old 12-08-2005, 08:34 PM
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From my understanding the TGV is only for cold start conditions, but once the car runs for about 30 secs(once the car warms up slightly) it should smooth out and idle like normal.

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#9 Old 12-09-2005, 08:49 PM
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The only real time that it's worth the time, effort, and money to remove the tumblers is in a High Boost, Highly Modified Engine.. I still even have mine in and I am running a GT35R at 24 PSI... I am debating on removing them, but have not decided yet..

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#10 Old 12-10-2005, 08:11 AM
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Originally Posted by LiL Shoaf
The only real time that it's worth the time, effort, and money to remove the tumblers is in a High Boost, Highly Modified Engine.. I still even have mine in and I am running a GT35R at 24 PSI... I am debating on removing them, but have not decided yet..
Not true at all.Thats like saying porting the heads on a stock WRX or putting a catless up pipe will do nothing.Removing a restriction=good stuff happening

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#11 Old 12-11-2005, 01:22 PM
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dumdum is right, removing restriction is always good, however the gains achieved by removing the Tumblers is hardly worth the time and money in moderate to low power, low boost applications.. Money and time can be much better spent in other places on 200-300hp cars that will gain much higher results...

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#12 Old 12-11-2005, 02:45 PM
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Originally Posted by LiL Shoaf
dumdum is right, removing restriction is always good, however the gains achieved by removing the Tumblers is hardly worth the time and money in moderate to low power, low boost applications.. Money and time can be much better spent in other places on 200-300hp cars that will gain much higher results...
I'll buy that for people with little wrenching skills,but for people with mechanical know how tumbler deletes=free.Not much to it removing the butterflies and removing the divider plate.But your right,for some its not quite as easy as installing an up-pipe or catback.Definatly a mod to do after the basic bolt ons are done.

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#13 Old 12-12-2005, 05:27 PM
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DumDum, did you get a dyno pre and post? i am curious to see if you netted the gains that APS claims they get in there "bolt On" delete kit found here:
http://www.airpowersystems.com.au/wr...ems/tdi_01.htm

Also, I have heard a lot of horror stories about guys that have tampered with the stock set up and caused some major issues with the ECU after that not reading the valve placement properly and the car running like crap...

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#14 Old 12-12-2005, 07:28 PM
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Quote:
Originally Posted by LiL Shoaf
DumDum, did you get a dyno pre and post? i am curious to see if you netted the gains that APS claims they get in there "bolt On" delete kit found here:
http://www.airpowersystems.com.au/wr...ems/tdi_01.htm

Also, I have heard a lot of horror stories about guys that have tampered with the stock set up and caused some major issues with the ECU after that not reading the valve placement properly and the car running like crap...
I myself have not put mine on yet.I have been closely watching a couple of threads over in NASIOC to see how its working out for others and the gains they are getting at different power levels.The main thing is in order to delete the TVG's correctly a custom tune is advisable to make sure your AFR's are good.Ecutek cannot remove the CEL for TVG's so you would have to use the APS or modify the factory ones.For Protune and Utec you can use the Ver7 risers ($100) as they(protune/utec) can remove the CEL.Alot of it is peole moding the stock ones are not putting the sensors/motors back on correctly.The higher the power level the more gain you will see with these.Sometimes in some vehicles the TVG's are not 100% open.They reach an 80-85 degree angle after cold start.Terrible restriction.

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#15 Old 01-04-2006, 05:30 PM
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So what is the final say on this Mod....does it really improve over all performance? ...what are it's down falls

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